1996 Johnson Evinrude "ED" 90 LV 125C, 130, 200, 225, 250 Service Manual, P/N 507128, Page 359Get this manual
14If more than half worn, remove the brush sets for replacement15Inspect locating ring on armature shaft and replace, if necessary
Cleaning and Inspection 1Inspect the brushesreplace if damaged, cracked, or worn in halfReplace brush springs, if weak2Clean commutator with 300-grade emery clothIf commutator surface is pitted or unevenly worn, turn it on latheRemove any trace of oil or metal dust from the commutator
3Check the armature on growler for shorted turnsCheck armature for grounding by using test light or meterInspect armature insulation for indications of overheating and damaged windingsClean off any deposits of carbon or foreign matter which may contribute to later failure of the windings
Check permanent magnetsMagnets should strongly attract any steel or iron object held inside the frameWeak magnets could cause excessive RPM on No Load Current Draw, Electric Starter test